Immobilized selenium in a porous carbon with the presence of oxygen, a method of making, and uses of immobilized selenium in a rechargeable battery

Patent metadata

Field	Value
Publication number	US-12002948-B2
Application number	US-202318149766-A
Country	US
Kind code	B2
Filing date	Jan 4, 2023
Priority date	Sep 22, 2015
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

In a method of preparing an immobilized selenium system or body, a selenium-carbon-oxygen mixture is formed. The mixture is then heated to a temperature above the melting temperature of selenium and the heated mixture is then cooled to ambient or room temperature, thereby forming the immobilized selenium system or body.

First claim

The invention claimed is:

1. A method of preparing an immobilized selenium body comprising:
(a) forming a mixture comprising selenium and a self-templated porous carbon;
(b) heating the mixture of step (a) to a temperature above the melting temperature of selenium; and
(c) causing the heated mixture of step (b) to cool to ambient or room temperature, thereby forming the immobilized selenium body,
wherein the self-templated porous carbon is made by a process that includes:
carbonizing a salt by melting until oversaturation of anions in the melt forms a crystallized salt in the melt;
increasing the viscosity of the melt until the melt coats surfaces of crystallites of the crystallized salt; and
solidifying carbon in the melt on the surfaces of the crystallites.

2. The method of claim 1 , wherein the self-templated porous carbon comprises oxygen species.

3. The method of claim 1 , further including, prior to step (a), subjecting the self-templated porous carbon to a post-treatment process to enhance the amount of oxygen species in the self-templated carbon.

4. The method of claim 3 , wherein the post-treatment process comprises reacting the self-templated porous carbon with an oxidizing agent.

5. The method of claim 4 , wherein the oxidizing agent comprises at least one of the following:
nitric acid;
hydrogen peroxide;
an organic peroxide;
oxygen; and/or
ozone.

6. The method of claim 4 , wherein the oxidizing agent comprises at least one of the following in an aqueous environment:
ammonium persulfate;
sodium persulfate;
potassium persulfate;
a salt of manganese;
a salt of vanadium; and/or
a salt of chromium.

7. The method of claim 1 , wherein the mixture further comprises sulfur.

8. The method of claim 1 , wherein the mixture further comprises tellurium.

9. The method of claim 1 , wherein the mixture further comprises sulfur and tellurium.

10. The method of claim 1 , wherein the salt comprises a carbonate anion.

11. The method of claim 10 , wherein the salt is potassium carbonate.

12. The method of claim 1 , wherein the salt comprises a citrate anion.

13. The method of claim 12 , wherein the salt is potassium citrate, calcium citrate or sodium citrate.

14. The method of claim 1 , wherein the salt comprises a gluconate anion.

15. The method of claim 14 , wherein the salt is potassium gluconate.

16. The method of claim 1 , wherein the salt comprises a tartrate anion.

17. The method of claim 16 , wherein the salt is potassium tartrate.

18. The method of claim 1 , wherein the salt comprises a bicarbonate anion.

19. The method of claim 1 , wherein the salt comprises an oxalate anion.

Assignees

• Ii Vi Delaware Inc
• Consejo Superior Investigacion

Inventors

• Xu Wen-Qing
• Li Xiaoming
• Patkar Shailesh
• Eissler Elgin E
• Solis Marta Sevilla
• Arias Antonio Benito Fuertes

Classifications

• H01M4/364 Primary

  as mixtures · CPC title

• C01B32/336

  characterised by gaseous activating agents · CPC title

• C01B32/348

  Metallic compounds · CPC title

• H01M4/38

  of elements or alloys · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title